2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/53758We begin with a few remarks on an explicit construction of a Bargmann-Wightman-Wigner-type quantum field theory [Phys. Lett. B {\bf 316}, 102 (1993)] in which bosons and associated antibosons have opposite relative intrinsic parities. We then construct $(1,0)\oplus(0,1)$ Majorana ($CP$ self conjugate) and Majorana-like ($CΓ^5$ self conjugate, $Γ^5=$ chirality operator) fields. We point out that this new structure in the space time symmetries may be relevant to $P$ and $CP$ violation.Talk presened by D. V. Ahluwalia at the III International Wigner Symposium, Christ Church, Oxford, September 1993.High Energy Physics - Theorytext